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(No Model.) 2 Sheets-Sheet 1 A. H. 85 P. A. LINDBERG,

CHAIR OR SEAT.

N0. 417,327. Patented Dec. 17, 1-889.

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(No Model.) 2 Sheets-Sheet 2. A. H. & P. A. LINDBERG.

CHAIR OR SEAT.

No. 417,327. Patented Dec. 17, 1889.

R O T N E V N WITNES ES W, Y

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U Nrrnn STATES PAT NT Urmcn.

ANDREV ll. LINDBERG AND PETER A. LINDBERG, OF NETV YORK, N. Y.

CHAIR on SEAT.

SPECIFICATION forming part of Letters Patent No. 417,327, dated December 1'7, 1889.

Application filed July 3, 1889. Serial No. 316,995. (No model) To (all whom it may concern:

' Be it known that we, ANDREW l-I. LINDBERG and PETER A. L1NnBERe,botl1 citizens of the United States, and residents of the city, county, and State of New York, have invented certain Improvements in Chairs or Seats, of which the following is a specification.

Our invention relates to chairs and similar seats made from metal or having metal fram es; and the object of the invention is to produce a light and stiff structure that will be strong and durable.

Our invention will be fully described hereinafter, and its novel features carefully defined in the claim.

In the accompanying drawings, illustrative of our invention, Figure 1 is a perspective view of a chair embodying ourimprovements. The seat of the chair, which may be of any kind whatever, is omitted from this view to avoid obscuring the construction of the metal frame.

Figs. 2, 3, and 4 are detail views illustrating theconstruction. These will be hereinafter explained.

a represents the metallic seat-frame, herein represented as circular in plan and made from angle-iron. This frame may, however, have any suitable form other than that shownas, for example, it might be quadrangular.

b represents the metallic back of the chair as a whole.

0 represents the several metallic legs of the chair, which are substantially alike in construction.

(Z represents the central clamp.

The back I) of the chair is made from a single bar or red. The ends of the rod form the outer standards Z lot the back. These standards have eyes formed in their lower extremities to receive bolts, screws, or rivets 2 2, whereby they are attached to the seat-frame a. At their upper ends these standards have each an inwardly-turned loop 3 formed in it to present a support for the shoulders of the sitter, and the two standards form a centrallyarranged upper loop 4: for the same purpose. The central standard of the back is formed by twisting together the two branches of the rod at 5 and 6, the bight of the rod, which forms the lower extremity of the central standard,

' pair.

being secured to the seat-frame by a bolt, screw, or rivet 7. This forms a strong and durable yet elastic back.

Each of the legs 0 has a brace formed integrally with it, and the two legs at one side of the chair form a pair. These pairs areconnected together by the clamp d, and this clamp also connects together the members of each Fig. 3 shows two of the legs forming the pair and their integral braces detached from the chair, but substantially in the positions they occupy therein. This view will suiiice to make clear the structure and form of all the legs. Each leg 0 is formed of a metal rod, and comprises the upright 8, provided with an eye at its upper end 9 to receive a bolt, screw, or rivet, whereby it is secured to the seat-frame a. The foot 10 of the leg is formed by bending the rod into a loop, which is splayed or flattened to provide a broad base. Above this footthe two branches of the bent rod are twisted together at 11. One branch extends inward in a radial manner to the clamp cl to form a brace 12, and at the clamp it has a curved portion 13, which is embraced by the clamp. Beyond the clamp this branch becomes a diagonal brace 14, which projects obliquely upward and outward and has an eye (15 in Fig. 3) formed in its end, whereby it is secured to the seat-frame a. The branches which form the braces of the two legs in the pair are bent in such a direction that the curved portions l3 13 of the two branches lie side by side in the clamp d, as seen in Fig. 2. This clamp is composed of two disks grooved to receive the curved portions 13 ot the rods which form both pairs of legs, and these disks are secured together in any suitable mannerfor example, by screws cl, as herein. shown.

Fig. 2 is an under side view of the upper disk of the clamp, showing the portion 13 of the branches in place in the grooves therein. We prefer to utilize the same screw, bolt, or rivet that secures the end 9 of one leg of the chair to the seat-frame for securing the end 5 15 of the brace ll of the other leg of the pair to the seat-frame.

In Fig. 4, which is a detached sectional view, a single bolt 2 is shown as applied to securing to the seat-frame a a standard 1 of the back, an upright S of a leg, and a brace 14:, formed integrally with the other leg of the pair to which the upright 8 belongs.

In Fig. 1 the clamp (Z is represented as disproportionately large in order to make the construction clearer; but this clamp may be of any convenient size.

It will be seen by inspection of Fig. 1 that our construction of the legs of the chair provides each leg with two braces which abut at the same point, or nearly so, on the central clamp cl, and these braces 12 and 14, together with the upright 8, form a triangle.

\Ve do not claini'the back of the chair, as this is not new with us; nor do we broadly claim a centrally-arranged tie for uniting the leg-braces of a chair.

Our invention resides in the peculiar construction and arrangement of the braces and the peculiar construction of the clamp for tying said braces together.

Having thus described our invention, we-

claim In a metallic chair or seat, the combination of the seat-frame, the legs, each of which is 25 formed integrally with its braces from a single piece of wire bent, twisted, and attached to the respective parts of the seat-frame, as set forth, the lower braces 12, the intermediate clalnped portions 13, the upper braces 14:, c

and the clamp d, consisting of two connected plates having grooves formed in pairs in their inner faces to receive the intermediate portions 13 of the braces, the said portions 13 being embraced between the two plates of said 3 5 ANDRE\V ll. vLINDB'ERG. PETER A. LINDBERG.

\Vitnesses:

HENRY CONNETT, J. I). CAPLINGER. 

